a(n) is the unique n-digit odd number (including leading zero(s)) with alternating even and odd digits and divisible by 5^n.
A321288
a(n) is the unique n-digit odd number (including leading zero(s)) with alternating even and odd digits and divisible by 5^n.
Terms
- a(0) =5a(1) =25a(2) =125a(3) =8125a(4) =78125a(5) =78125a(6) =5078125a(7) =5078125a(8) =705078125a(9) =2705078125a(10) =72705078125a(11) =272705078125
External references
- oeis: A321288